Assign: add "is not set" operator

fixes #1436

application/views/helpers/FormDataFilter.php

@@ -174,7 +174,7 @@ class Zend_View_Helper_FormDataFilter extends Zend_View_Helper_FormElement
                 $filter->setExpression(json_decode($filter->getExpression()));
             }
 
-            if ($filter->getExpression() === true) {
+            if (($filter->getExpression() === true) || ($filter->getExpression() === false)) {
                 return '';
             }
             $dummy = IcingaObject::createByType($type);
@@ -306,7 +306,8 @@ class Zend_View_Helper_FormDataFilter extends Zend_View_Helper_FormElement
             '<=' => '<=',
             'in' => 'in',
             'contains' => 'contains',
-            'true' => 'is true (or set)',
+            'true'     => 'is true (or set)',
+            'false'    => 'is false (or not set)',
         );
 
         if ($filter === null) {
@@ -318,6 +319,8 @@ class Zend_View_Helper_FormDataFilter extends Zend_View_Helper_FormElement
                 $expression = json_decode($filter->getExpression());
                 if ($expression === true) {
                     $sign = 'true';
+                } elseif ($expression === false) {
+                    $sign = 'false';
                 } elseif (is_array($expression)) {
                     $sign = 'in';
                 } else {

doc/82-Changelog.md

@@ -15,6 +15,9 @@ before switching to a new version.
 * FEATURE: Grant access to Service Set in a controlled way
 * FIX: do not allow a user to create hosts he wouldn't be allowed to see #1451
 
+### Icinga Configuration
+* FEATURE: Add 'is false (or not set)' condition for apply rules (#1436)
+
 ### User Interface
 * FEATURE: Admins have now access to JSON download links in many places
 * FEATURE: Users equipped with related permissions can toggle "Show SQL" in the GUI

library/Director/IcingaConfig/AssignRenderer.php

@@ -153,6 +153,12 @@ class AssignRenderer
             if ($rawExpression === true) {
                 return $column;
             }
+            if ($rawExpression === false) {
+                return sprintf(
+                    '! %s',
+                    $column
+                );
+            }
             if (strpos($expression, '*') === false) {
                 return $this->renderEquals($column, $expression);
             } else {

library/Director/Web/Form/Element/DataFilter.php

@@ -270,6 +270,12 @@ class DataFilter extends FormElement
                 '=',
                 json_encode(true)
             );
+        } elseif ($entry['sign'] === 'false') {
+            return Filter::expression(
+                $entry['column'],
+                '=',
+                json_encode(false)
+            );
         } elseif ($entry['sign'] === 'in') {
             if (array_key_exists('value', $entry)) {
                 if (is_array($entry['value'])) {